HOLLEY FUEL RAIL KIT SUIT LS1 CHEV GM Black Aluminum # HO534-219HOLLEY FUEL RAIL KIT SUIT LS1 CHEV GM Black Aluminum # HO534 219 Fuel Rails, Aluminum, Black Anodized, Chevy, Kit Fuel Rail Material: Aluminum Fuel Rail Color: Black Fuel Rail Inlet Size: 8 AN O ring Fittings Included: No Hardware Included: Yes Quantity: Sold as a kit. Notes: Fits Holley HLY 300 137 or HLY 300 137BK single plane intakes. Holley EFI Fuel Rails These machined aluminum EFI fuel rails are capable of handling 1,100+ hp engines. They